ASYNCHRONOUS
SLIP RING MOTORS

ASYNCHRONOUS
SLIP RING MOTORS

TECHNICAL DATA

Introduction

These three-phase metallurgical industrial and crane motors, available with wound or squirrel cage rotors, are specifically designed for metallurgical cranes and similar heavy-duty machinery. Engineered with high overload capacity and exceptional mechanical strength, they are ideal for short duty cycles, intermittent periodic operations, and equipment that requires frequent starting, braking, or is exposed to vibration and shock.

Key Characteristics

• Power output and mounting dimensions comply with IEC 72 standards
• Suitable for operation at altitudes up to 1,000 m
• Available in two insulation classes:
  • Class F: for ambient temperatures up to 40°C
  • Class H: for metallurgical industrial environments, suitable for temperatures up to 60°C
    (Note: Both classes share the same technical performance data)
• Enclosure protection degrees:
  • IP44 for standard environments
  • IP55 for harsh metallurgical industrial conditions

Rated Voltage and Frequency

• 380 V / 50 Hz

ASYNCHRONOUS
SLIP RING MOTORS

ASYNCHRONOUS
SLIP RING MOTORS

TECHNICAL DATA

IEC 132-450   380-420 / 50Hz

IEC Motors – Frame Sizes 132 to 450

Voltage and Frequency

• 380–420 V, 50 Hz

Main Applications

• Pumps
• Blowers
• Conveyors
• Compressors
• Gearboxes
• Marble factories
• Steel industry

Standard Features

• Heavy-duty cast iron housing, with feet integral to the casing for added robustness
• Protection degree: IP55
• Slip ring and brush compartment isolated from stator and rotor, located behind the non-drive end (NDE) bearing
• Insulation class F, with temperature rise limited to 80°C
• Standard PTC thermistors in windings (one per phase, series connected)
• Oil seals on both drive end (DE) and non-drive end (NDE)
• Top-mounted terminal box, rotatable 180° for flexible installation
• Premium bearings: SKF or NSK
• Regreasable bearings for extended service life
• Standard color: RAL 5010 (Blue)

Optional Features

• Special voltages and frequencies available on request
• Insulation class H for higher thermal tolerance
• Higher protection degrees: IP56 / IP65
• Terminal box positioning: right- or left-hand side
• PT100 sensors in windings and/or bearings for advanced thermal monitoring
• Reduced frame motors (non-IEC) for compact applications
• Anti-condensation heaters to prevent moisture buildup
• Roller bearings on drive end for high radial loads
• Epoxy resin encapsulated terminal box for harsh environments
• Epoxy resin encapsulated windings for superior insulation
• Silicone encapsulated terminal box for enhanced protection
• Custom cable executions, either via terminal box or direct cable connection